Skew back for furnaces



April 7, 1925. 1,532,568

F. L. ANTlsl-:LL

sKEw BACK FOR FURNAcEs Filed' April 28, 1923 Patented Apr. 7, 1925.

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BeY it. :nown tha-tl; :FRA-inn LxAN'rlsiiLn acitizen'ottthe Unitedfrmtes; and, a'fresifdentoi'erth- Joy;countyaotflvliddlesex,

5 StateA of New -U ci seygfhave :invented:4 centain new 'and' useful provementsvin* vSlrew Backs fory urnaces,' of .'wl'iich `the .Y `following` is a specification.

1,This"inventionfrelates Jto :am improved ineens for *supper ng; thevfrocts oli". -open `4hearth urnatcesfhe-= par ular riconsisting of an improved skew .-baek'fftor-xthe root: so' constructed and arranged :that the major part of the-skewback;in'cludngipthe means forvsecuring it ,to-tt=l1ebeani buck .sta-ys, is-:eX-posedf'to the ain-sor.` #effect an air` cocledfurnact: skew; sack.

-Priorsto iny "invention",y it 'gwas Yether igenera.L fpracticcfftoetcon'struct., aiskew back fof Ythefordinary sha-pe, the skew ibackrbeing lholl w so .that waterv couldbe passed` therethrough .inl order` to` .vafter *cool* thefsarne. f This waterfcooli' was neeessaryfas the heat or-the furnace" is in direct :Contact witlfi the under s iace lofx itheskew. back;Lv which-r ref eultedf in the skew.i back Ientmeting-thereroin Efe-und -byzenperiencefhowever,` ft'hat `v-the water c'eeled strncture 5 is inetlici'entin prac# ft' itherniore5'- theusezfoi' aravater cooled skew back is not desirablebeca'use giinrt'he event of accident to the pumping equipment, or the freezing of tlfefpipes, or for any other reason, the water is shut oil?, the skew back will melt and the rooIn or arch will fall in.

l have overcome these objections by constructing an air cooled skew back.

Referring to the drawings in which the same reference character indicates the saine part in the several views:

Fig. l represents a vertical transverse cross section of the furnace showing the structure embodying my invention,parts kbeing broken away. f

Fig. 2 is an elevation of the furnace and skew"- back structure, parts being broken away.

Fig. 3 is a perspective View of the skew hack embodying my invention. Y

In the drawing, A is the support, foundation or floor, B is the lower portion of the furnace structure, C is the roof of the furnace structure, and D is the door.

While the furnace structure is conventionl ally shown in the drawing, it is to be under- 1n it isz-in stood; that- V itjrisff'builta-inf t'henusual finely-ol" lire-brick and fire'prooffmaterial. l() fand. *511* @area ther" ordinary; upright beam fbuckstays -seeureidetol the foundationA inthze usualfiway at lzand'l, theupperiporftionsuol the dnrck` staysebei-ngl joined byl a tie yrod '114,' Y,the'twoportions olthefftie` rod fb'eing f; connected: )by a i itu-rn# buckle; fas .-usual "The buck; staysrl() arefshogwnia the firent'v off the -ffurnace', and qa l; :at "etheezrear thereof. .Y -'vhevarchedroo-i:ot thegfurnace'gj y `:portedibyythe.'walls fof the; fr 'ith-rust: isrtaken-up by; the i.; NJSistine; of. :a "metal 'han A AG* Iarch o pported vat, `the othel si-de. by ndlgof the skev fhack 130 `the being; formed iat'an angle to .the mainab'ody .oiof i efskew; back which -rests fagainstthea4 .stays i lQga'nd A is sezfcuredgthereto hy' 'bolt-s andsat a .fp oint removed :iffizonr the.: door ofmthe 51' lrinice in a; position: to 'fresist;a-nd; hold tfheftlrrust "of thearchfB. A

A@ 'Strengthening trib; 33 fextends longitudinall*, aleng'the innerrsfrfece oftheskew fbackj ust `whovethepporting Bl.

@he nippon, portgon... 32 of the =`skewlback .being exposed to theriairisf-'consequently 'cooledebyf:thexsurroundingf atmosphere, and the temperature'is therefore a little above the temperature of the room.

Another feature of my improved skew back is due to the fact that the supporting flange 3l is beveled on its side at 34 which facilitates the use of the charging machine when loading the furnace. In the event that the charging machine is too high it will Vstrike against the sloping surface 3e of the air cooled skew back and be deflected downward intoy the furnace proper.

`When the charge box came into contact with the vertical face of the Old form of skew back the impact weakened the arch so that there was danger of it falling in upon subsequent charges.

The door D is supported on hangers 40 and L1 secured to a. horizontal rod 42, the ends of the `rod at 43 and 4A engaging with guiding cam shaped grooves 51 and 52 in supports secured to the buck stays 10, as shown. Suitable hoisting means (not loo shown) are used to lift the door in the direction of the arrows shown in Figs. l and 2. As the ends of the rod 4t2 engage the walls of the guide grooves 51 and 52 the door upon its being hoisted will be removed from the furnace mouth by the cam action of the ends of the rod 4;-2 on the walls ofy the guide grooves 51 and 52, as clearly indicated, the door being thereby removed from the furnace mouth and lifted to a suitable position just above it.

By above described it is apparent (11) that there is provided a structure of su Yicient resistance above the line of thrust of the arch to withstand the stresses of the same, or, (2) that the securing points are above the line of pressure on the skew back, which latter is supported by the buck stays and impinges against them above the line of pressure, (3) that the skew back is of such a construction and so supported that the greater portion of its body or structure is in contact with the air and that it i-s in posi tion to conduct the heat away from the furnace so that it may be absorbed by the surrounding atmosphere (et) and that by reason of its beveled edged formation just above the furnace mouth an eflicient guiding means is present to engage the charging means when loading without danger of permenently destroying the structure due to t-he impact of the furnace charging means. As changes of construction could be made withinvthe scope of my invention it is intended that all matter contained in the above description or shown in the. accompanying drawing shall be interp-reted as illustrative and not in a limiting sense.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

l. In a furnace having an arched roof means of the construction of slrew back and upright buck stays, a supporting skew baclr having an upright plate resting against said buclr stays, a rib projecting from said plate opposite said buck stays and a downward extensionv of saiciplate below said rib inclined in a plane at right angle to the thrust of said arch.

2. ln a furnace having an arched roof and upright buclr stays, a supporting skew back having an upright plate resting against said buck stays, a rib projecting from said plate opposite said buclr stays over and spaced a slight distance above said arch, and a downward extension of said plate below said rib supporting, and at substantially a rightl angle to the thrust of said arch.

3. An arch supporting skew back`comprising a dat plate member having a portion adjacent one edge inclined at an angle to the plane of said plate and a rib member adjacent the intersection of the planes of the flat and inclined portions.

el.. in a furnace, a roof arch, upright stays at the sides of the furnace, and a skew back retaining member for said arch having an'upright plate portion extending vabo-ve the arch of said furnace and resting against the buck stays and a portion extending normal to the thrust of said arch and supportingV one edge of said arch. Y

5. In a furnace, a roof arch, upright stays at the sides of saidv furnace, and a skew back retaining member for said arch havinofr an upright plate portion extending above the arch of said furnace and resting against the buck stays, a portion extending normal to the thrust of said arch and supporting one edge of said arch, and a rib member extending from said skew back immediately above said arch.

FRANK L. VAN'H.Sillila 

